If local laws fail to impart wisdom, here is guideline from ancient times that bears timeless truth across nations and cultures: "Whoever commits adultery with a woman has no sense... ... because jealousy arouses a husband's fury. The husband will show no mercy when he takes revenge. No amount of money will change his mind. The largest bribe will not satisfy him." Proverbs 6:32-35 GOD'S WORD® Translation As an example, here is a local occurence in 2010: Briton, 28, killed in Philippines by jealous boyfriend of woman he intended to marry | Daily Mail Online So, in Philippines, yes, it is best to court and/or date only a Filipina singleton, and never a legally-married, a common-law married, an engaged, or a betrothed woman, to keep one's good health.